Demonstrators protest against the cost of bus fares in Sao Paulo on Monday 17 June. Photograph: ZUMA/Rex Features

Brazil experienced one of its biggest nights of protest in decades on Monday as more than 100,000 people took to the streets nationwide to express their frustration at heavyhanded policing, poor public services and high costs for the World Cup.

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Your stories so far

Here is a selection of some of the photos, videos and stories you've sent in so far. You can see more on the assignment homepage.

Fortaleza is one of the most violent cities in the world (13a by ONU) and will be a place for some matches of World Soccer Championship next year. People did a protest march of about 10.000 protesters and gave this warning to foreign people no to come here because their lives would be in danger. The murder rate in Fortaleza is about 60 / 10.000 inhabitants.

The feeling that took so many people to the streets is not only brazilian, it's not only turkish, it is global. It's bigger than a president, the government.

It's about an order, a system, our global system.

The fact is that we don't feel represented. We don't have voice

The truth is that we lost our life thinking about the politics and it makes no difference because they don't have enough power to change what need to be changed and as we live in what we call as democracy, the fault is all ours

because WE don't know how to choose good representatives

and in the end we feel guilty.

Those protests is our voice that was quiet for years and now is screaming " I DO CARE. I NEED TO TO SOMETHING TO CHANGE, BUT I DON'T BELIEVE IN THE POLITICS WE HAVE AND NOW I BELIEVE IN POWER OF PEOPLE."

We passed by open chest and lung full! We went (at least the group I was!) of Largo da Batata until Espraiada, where we crossed and close the Marginal Pinheiros (probably 9 km).

Who knew that together we could get this kind of repercussion?

Without the police, everything flowed without violence. It is hard to pick a word to define what happened yesterday. Unfortunately, some political parties were opportunistic and raised up his flags.

But even this situation was dealed only with the attitude of the majority, amid cries as "lowers the party flag and raises up the flag of Brazil!" and even in the attitude of most get down on the floor to show that we wasnt represented by them.

A love that was asleep in every person who was there! One thing that I thought was beautiful contrast of the population. Since the kids who barely knew why they was there until the lady of 82 years holding a giant poster saying "82 years. Did not come to play, but to express." No matter, they were all together.

People in the windows, inside their offices shaking white flags. Drivers in bus flashing lights and waving as an incentive.

And many ... so many applauses.

Brazil woke up, indeed. For many things! There, each one was expressing his desire for change and your personal unsatisfaction. Whether for transportation, health, sexual orientation, education.

In my opinion I much hope, for real, that´s only the beginning of a new Brazil.

Who was there, like me, can not measure the beauty and emotion of seeing that the whole is stronger. And it have a voice.

And a voice with owner. Yesterday I represent you that had to work late, you for some reason couldnt go.

Yesterday, we replaced "I" to "we".

Yesterday, we made the world listen that here beats a green and yellow heart.

A green and yellow heart full of hope and idealism. But, before that... Love. Yes, thats what i saw yesterday.

Approximately 300 gathered in Copenhagen, Denmark to protest against corruption and social injustice in Brazil, showing support for the protests that are sweeping the South American country. Most participants were brazilians but a few danish joined the manifestation that gathered in front of the city hall and finished in front of the Brazilian Embassy in Denmark where the participants chantered the brazilain national anthem.

Today, 18 june, a protest took placê at Liberdade square, in Porto city, Portugal. Many people, from diferent countries were there with us discussing about politics, social problems and economic crisis all over the world. It was fabulous!